Question

which statement about the cell membrane is true? it contains cellulose and sugars that are involved in communication. it is present in animal cells only. it is rigid and elastic for supporting the cells shape. it prevents harmful substances from entering a cell.

Explanation:

Cell membrane is a selectively - permeable barrier. It allows certain substances to pass through while preventing harmful substances from entering the cell. Cellulose is in plant cell walls, not cell membranes. Cell membranes are in both animal and plant cells. It is flexible, not rigid and elastic for cell - shape support (cell walls do that in plants).

Answer:

It prevents harmful substances from entering a cell.